How can i add keyframes to slow motion

[brian]

This is a common question:
https://forum.shotcut.org/search?q=speed%20keyframe

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Increasing speed acceleration?

Hi! I could use some help. How could you have an increasing speed acceleration for a video clip? The only way, I know, is to split the clip and speed up a little more each split part. But maybe someone knows a better way? The best would be, if it looks like a faded in transition…, but only for the speed. TIA Best regards